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The modification of secondary high molecular weight guayule rubber with metachloroperoxybenzoic acid

โœ Scribed by S. F. Thames; P. W. Poole

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
388 KB
Volume
47
Category
Article
ISSN
0021-8995

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โœฆ Synopsis

The epoxidation of secondary high molecular weight guayule rubber has been accomplished. The reaction is performed using metachloroperoxybenzoic acid as the epoxidation agent in various stoichiometric ratios including 5 , 10, 20, and 50 mol %. The products were characterized by infrared spectroscopy, 'H-and 13C-nuclear magnetic resonance (NMR) , differential scanning calorimetry, and elemental analysis. 'H-NMR is used quantitatively to calculate epoxidation levels that are compared to stoichiometry. DSC results record a linear relationship between percent epoxidation and Tg.

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Synthesis and characterization of pendent hydroxy fluoroesters of secondary high molecular weight guayule rubber
โœ Shelby F. Thames; Sandhya Gupta ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 290 KB ๐Ÿ‘ 2 views

The epoxidation of secondary high molecular weight guayule rubber (SHMWGR) and subsequent ring opening with fluoroacids to give hydroxyfluoroesters (FGR) is reported. Structural characterization was performed with FTIR; 1 H-, 13 C-, and 19 F-NMR; and DSC. The percent epoxidation was quantitatively d